Modification of Activated Carbon Using Microwave Radiation and Its Effects on the Adsorption of SO2

被引:13
|
作者
Zhang, Liqiang [1 ]
Cui, Lin [1 ]
Wang, Zhiqiang [1 ]
Dong, Yong [1 ]
机构
[1] Shandong Univ, Natl Engn Lab Coal Fired Pollutants Emiss Reduct, Jinan 250061, Peoples R China
基金
中国国家自然科学基金;
关键词
Activated Carbon; Microwave Treatment; Surface Properties; SO2; Adsorption; SURFACE-CHEMISTRY; SULFUR-DIOXIDE; FUNCTIONAL-GROUPS; NITRIC-ACID; REGENERATION; FIBERS; OXYGEN; REMOVAL; PHENOL; OXIDE;
D O I
10.1252/jcej.14we081
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Modification of a coconut shell-based activated carbon under N-2 atmosphere has been carried out using a microwave device operating at 2,450 MHz and different microwave powers. The samples were characterized by means of low temperature N-2 adsorption, elemental analysis, and Boehm titration. The results show that microwave heating treatment results in a minor increase in micropore surface area and pore volume and has little effect on average micropore width. The results also show that microwave heating treatment is a very effective method for modifying the surface chemistry of the activated carbon. A gradual decrease in the surface acidic functional groups is observed, while the surface basicity is enhanced with increasing microwave power. Adsorption studies show enhanced adsorption of SO2 onto microwave-treated carbon, caused by modification of the surface chemistry. During microwave treatment, the active sites are induced by decomposition of CO-type surface oxygen groups, which favors the adsorption and oxidation of SO2.
引用
收藏
页码:52 / 59
页数:8
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